Rotary brush



Patented July 27, L92@ UNITED STATES JOSEPH P. MCDNALD, E CHICAG. LLNOIS.

ROTARY' BRUSH.

.Application led January 1].. 1924-. Serial No. @5.648.

This invention relates to certain new and useful improvements in rotary brushes and has particular reference to a device of this kind adapted to be manually directed over the surface to be cleaned and embodying a motor for causing rotation of the brush head.

The primary object of the invention is to generally simplify and improve devices of the above kind, whereby the same may meet with all of the requirements for a successful commercial use.

Another object of the invention is to provide for the ready removal or replacement of the brush head, whereby brush heads of various styles and kinds may be interchangeably employed in accordance with the re* qnirements of the specific use to which a device is put.

Still another object of the invention is to provide an improved means for driving the brush head and detachably mounting the same in place.

A still further object of the invention is to provide a brush including a handle composed of a shank bifurcated, at one end and provided with a removable hand grip at the other end whereby an extension handle shank may be interposed between the bifurcated portion and the hand grip. the bifurcated portion being provided with means for the removable mounting` of a brush head therein, and for facilitating driving of said brush head.

@ther objects will become apparent as the nature of the invention is better understood, and the same consists in the novel form, combination, and arrangement of parts hereinafter more fully described, shown in the accompanying drawing and claimed.

In the drawings, wherein like reference characters indicate corresponding parts in the two views Figure l is a plan View partly broken away away and in section, of a rotary brush constructed in accordance with the present invention, and

Figure 2 is an enlarged fragmentary detail sectional view, taken substantially upon the line 2-2 of Figure 1.

Referring more in detail to the drawing, the present invention embodies a handle composed of a shank 5, that is relatively short and which is bifurcated at one end to form a fork member composed of a pair of Awith a transverse pin i arm-s 6 and T. and that has a removable hand member 8 at its other end. The hand grip member 8 may be provided with a threaded socket for detachable engagement with a screw threaded stem 7 provided upon the last mentioned endof the shank 5 as shown in Figure l, so that when the hand grip 8 is removed an extension handle shank may be interposed between the shank 5 and the hand grip 8 for lengthening the handle in case it is desired to move the brush head over a remote or elevated surface.

rlhe arm (i provided with a transverse opening in which is slidably mounted rod 9 that nas a liearinsz L block l() lined upon the inner end thereof. said rod being normally springr pre" Al inwardly by means of a compression spring' ll interposed between the arm 5 and the bearing block l0. 9 is provided upon its outer end with a head l2 to limit the inward sliding` movement of the same under the influence of the spring l.l and the bearinlir block l0 is provided with a conical socket in its inner face for engage ment by the pointed end of a shaft lll; which carries the cylindrical rotary brush lieadd. Vlhe arm T has a stub shaft it snitablj.' jon rn alled therein co--ixial with the red 9. and this stub shaft has a socket at its inner endl for removable reception of the other end portion li' of the shaft lll. said end portion l of the shaft being provided. di for engagement; in opposed long` .dinal slots 19 provided in opposite sides cf the walls of the sockets formed ir the shaft 'lf3 whereby the brush shaft lil is cau-sed to rotate when rotation 'is imparted to vthe stub shaft Ai6. and whereb v remo val ot the brush head is readily' permitted.

The brush head l5 shown is in the form of a conca-ved cylinder. but other forms of brushes may be employed to suit the specilic requirements of the use to which the brush is put.

its shown clearly in TEigure 2, a worm gear 2O is lriyed upon the stub shaft 16, and this gear meshes with a worm 2l thatA is snitabh;v icnrnalled longitudinally of the arm 7 within a coniibined gear casing and bracket 22 that is secured upon said arm 'i' by means of screws 23 or the like.

A small electric motor 24 is suitably secured to the handle at the juncture of the shank 5 with the arms (i and 7, and the armature shaft of this motor is connected to The rod lli() ltlti a flexible shaft Q5 that .is also eonnected vto the worm '21, it being noted .that the feed wires 26 of the motor 24 may be provided with a suitable vattaclunent plugforeugage nient in the plug 's'oket 'of any form of house Wiring system.

In use, the motor 24 is started to drive the flexible shaft 25, this rotation is imparted to the brush head l5 through the gearing described. Should it he desired to remove the brush lier renewal or repair pur- I`poses ,or for substituting a different forni of brush thereof, it is .simply necessaryY tio move :the brush end-Wise in 'the Adirection of the arm 6 `so as 'to cause compression rof the spring 1l until fthe pin 18'di'sengages from the slot 19 in ithe shaft 16. The brush head is then bodily moved outwardly from be- `tween the arms 'l and 7, and a reversal of this :operation vrif'll result `in .replacing the brush.

.From the Iabove description, it is `believed lthat the construction and 4operation as well Las lthe advantages oi' the present invention ingsfinounted in said openings. one of said n hearings being rotatable and provided with driving 'gear7 a gear casing mounted on one oili'said yarms, said one arm and easing; serving; `to 'house said gear, a Worin located rinf'said gear casing' and in mesh with said gear. anotor mounted on the handle and conneoted with said Worin,y yand a rotary tool arranged between said arms, sai-d tool being; mounted. atits opposite ends in said hearings and being` keyed to the rotatablehear-ing.

ln testimony whereof I allix inv signature.

JOSEPH P. MCD'ONALD. 

